INTERCROPPING MAIZE - COMMON BEAN ENHANCES MICROBIAL CARBON AND NITROGEN IN LOW-PHOSPHORUS SOIL UNDER MEDITERRANEAN CONDITIONS

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Abstract


The positive effect of intercropping under low phosphorus (P) conditions has already been reported in previous works. The aim of this study was to test the hypothesis that intercropping (common bean - maize) in P deficient soil, can enrich carbon (C) and nitrogen (N) of the microbial biomass (MB) through a transfer from root nodules of the plant and rhizospheric microbial flora in a field located in “Setif region” in northern Algerian agroecosystem(Mediterranean climate). The rate of nodular N sequestered in intercropped common bean was higher compared to sole crops and fallow. However, under intercropped and low P conditions, the rate of nodular N sequestered is highest over two years. Carbon of the microbial biomass (MB-C) is higher in the intercropping compared to sole crops and fallow but it is even higher in P deficient soil. Moreover, a strong correlation is established between nodular C and MB in intercropping under low P conditions. In these same conditions, the total soil respiration was the highest and the lowest C:N ratio of MB was recorded. These results showed that in low P soil, intercropping is a good solution to enhance the rhizospheric MB that can fertilize the soil and recycle mineral elements.

About the authors

Mourad Latati

Végétales. Laboratoire d’amélioration intégrative des productions végétale

Author for correspondence.
Email: m.latati@ensa.dz
Avenue Hassane Badi, El Harrach, 16200 Algiers, Algeria
Doctor National School of Agronomy, Department of Plant Productions. Laboratory of Integrative Improvement of Productions

Adel Rebouh Aouiche

Ecole Préparatoire en science de la Nature et de la vie d’Alger

Email: n.rebouh@outlook.fr
Avennue Ahmed Hamidouch Route de Beaulieu, El Harrach 162000 Algérie
Phd student, University Abderaman Mira de Bejaia - Campus Targa Uzemur

Yacer Rebouh Nazih

Universite Abderrahmane Mira - Bejaia

Email: n.rebouh@outlook.fr
Bedjaia, Algeria
Professor National School of Agronomy, Department of Plant Productions. Laboratory of Integrative Improvement of Productions

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Copyright (c) 2018 Latati M., Aouiche A.R., Nazih Y.R.

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